138718275173 has 2 divisors, whose sum is σ = 138718275174. Its totient is φ = 138718275172.

The previous prime is 138718275151. The next prime is 138718275181. The reversal of 138718275173 is 371572817831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124794747169 + 13923528004 = 353263^2 + 117998^2 .

It is an emirp because it is prime and its reverse (371572817831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138718275173 - 2⁶ = 138718275109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138718271173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69359137586 + 69359137587.

It is an arithmetic number, because the mean of its divisors is an integer number (69359137587).

Almost surely, 2^138718275173 is an apocalyptic number.

It is an amenable number.

138718275173 is a deficient number, since it is larger than the sum of its proper divisors (1).

138718275173 is an equidigital number, since it uses as much as digits as its factorization.

138718275173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1975680, while the sum is 53.

The spelling of 138718275173 in words is "one hundred thirty-eight billion, seven hundred eighteen million, two hundred seventy-five thousand, one hundred seventy-three".